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#!/usr/bin/perl
#
# Parameters supported:
#
# 	config
# 	autoconf
#
# Configurable variables
#
# 	url      - Override default status-url
#
# Magic markers:
#%# family=auto
#%# capabilities=autoconf

my $ret = undef;
if (!eval "require LWP::UserAgent;") {
    $ret = "LWP::UserAgent not found";
}

my $URL = exists $ENV{'url'} ? $ENV{'url'} : "http://127.0.0.1:%d/server-status?auto";
my @PORTS = exists $ENV{'ports'} ? split(' ', $ENV{'ports'}) : (80);
my %chars = (
	     # '\_' => 'Waiting',
	     # 'S' => 'Starting up',
	     'R' => 'Reading request',
	     'W' => 'Sending reply',
	     'K' => 'Keepalive',
	     'D' => 'DNS lookup',
	     'C' => 'Closing',
	     # 'L' => 'Logging',
	     # 'G' => 'Gracefully finishing',
	     # 'I' => 'Idle cleanup',
	     # '\.' => 'Open slot',
	     );

#    "_" Waiting for Connection, "S" Starting up, "R" Reading Request,
#    "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
#    "C" Closing connection, "L" Logging, "G" Gracefully finishing,
#    "I" Idle cleanup of worker, "." Open slot with no current process

if (exists $ARGV[0] and $ARGV[0] eq "autoconf") {
    if ($ret) {
	print "no ($ret)\n";
	exit 1;
    }
    my $ua = LWP::UserAgent->new(timeout => 30);
    my @badports;
    
    foreach my $port (@PORTS) {
	my $url = sprintf $URL, $port;
	my $response = $ua->request(HTTP::Request->new('GET',$url));
	push @badports, $port unless $response->is_success and $response->content =~ /Scoreboard/im;
    }
    
    if (@badports) {
	print "no (no apache server-status on ports @badports)\n";
	exit 1;
    } else {
	print "yes\n";
	exit 0;
    }
}

if (exists $ARGV[0] and $ARGV[0] eq "config") {
    print "graph_title Apache activity\n";
    print "graph_args --base 1000 -l 0\n";
    print "graph_category apache\n";
    print "graph_vlabel processes\n";
    foreach my $port (@PORTS) {
	while (my ($char, $val) = each (%chars)) {
	    $char =~ s/\\\./dot/;
            $char =~ s/\\\_/underline/;
            print "activity_${port}_${char}.label ";
	    print $val, "\n";
            print "activity_${port}_${char}.type GAUGE\n";
        }
    }    
    exit 0;
}

foreach my $port (@PORTS) {
    my $ua = LWP::UserAgent->new (timeout => 30);
    my $url = sprintf $URL, $port;
    my $response = $ua->request (HTTP::Request->new('GET',$url));
    if ($response->content =~ /^Scoreboard\:\s?(.*)$/sm) {
	my $string = $1;
	chomp $string;
	my @act = split (//, $string);
	foreach my $char (keys (%chars)) {
	    my $num = scalar (grep (/$char/, @act));
	    $char =~ s/\\\./dot/;
	    $char =~ s/\\\_/underline/;
	    print "activity_${port}_${char}.value $num\n";
	}
    }
}